An obelus (symbol: ÷ or †, plural: obeluses or obeli) is a symbol consisting of a short horizontal line with a dot above and another dot below, and in other uses it is a symbol resembling a small dagger. In mathematics it is mainly used to represent the mathematical operation of division. It is therefore commonly called the division sign. In editing texts an obelus takes the form of a dagger mark (†) and is used as a reference mark, or to indicate that a person is dead, and often used to indicate a footnote.[1][2][3]

The word "obelus" comes from ὀβελός, the Ancient Greek word for a sharpened stick, spit, or pointed pillar. This is the same root as that of the word "obelisk".

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Originally this sign (or a plain line) was used in ancient manuscripts to mark passages that were suspected of being corrupted or spurious; the practice of adding such marginal notes became known as obelism. The dagger symbol, also called an obelisk, is derived from the obelus and continues to be used for this purpose. As Streeter (1924) writes:

The obelus, invented by Aristarchus to mark suspected passages in Homer, is frequent in manuscripts of the Gospel to mark just those sections, like the Pericope in John, which modern editors reject. The first corrector of [the Codex Sinaiticus], probably the contemporary διορθωτής, was at pains to enclose in brackets and mark with dots for deletion two famous passages in Luke written by the original scribe which, being absent from B W 579 and the Egyptian versions, we infer were not accepted in the text at that time dominant in Alexandria, viz. the incident of the "Bloody Sweat" in Gethsemane (Lk.xxi.43 f.) and the saying "Father forgive them" (Lk.xi.34).[4]

The obelus was first used as a symbol for division in 1659 in the algebra book Teutsche Algebra by Johann Rahn. Some think that John Pell, who edited the book, may have been responsible for this use of the symbol. Other symbols for division include the slash or solidus (/), the colon (:), and the fraction bar (the horizontal bar in a vertical fraction).

Historically, the obelus has also been used to represent subtraction in Northern Europe; such usage continued in some parts of Europe (including Norway and, until fairly recently, Denmark).[5] In Italy the obelus is sometimes use to denote a range of values.

On UNIX-based systems using Screen or X with a Compose key enabled, it can be produced by composing : (colon) and - (hyphen/minus), though this is locale- and setting-dependent. It may also be input by Unicode code-point on GTK-based applications by pressing Control+⇧ Shift+U, followed by the code point in hexadecimal (F7) and terminated by return.

In the Unicode character set, the obelus is known as the "division sign" and has the code point U+00F7.[7] In HTML, it can be encoded as &divide; or &#xF7; (at HTML level 3.2), or as &#247;.

1.
Obol (coin)
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The obol was a form of ancient Greek currency and weight. Obols were used from early times, according to Plutarch they were originally spits of copper or bronze traded by weight, while six obols make a drachma or a handful, since that was as many as the hand could grasp. Heraklides of Pontus in his work on Etymologies mentions the obols of Heraion and this is confirmed by the historian Ephorus on his work On Inventions. Excavations at Argos discovered several dozen of these early obols, dated well before 800 BC, Plutarch states the Spartans had an iron obol of four coppers. They retained the cumbersome and impractical bars rather than proper coins to discourage the pursuit of wealth, in Classical Athens, obols were traded as silver coins. Six obols made up the drachma, there were also coins worth two obols and three obols. Each obol was divisible into eight coppers, during this era, an obol purchased a kantharos and chous of wine. Three obols was a rate for prostitutes. Legend had it that those without wealth or whose friends refused to follow proper burial rites were forced to wander the banks of the river for one hundred years. The obol or obolus was also a measurement of Greek, Roman, in ancient Greece, it was generally reckoned as 1⁄6 drachma. Under Roman rule, it was defined as 1⁄48 of a Roman ounce or about 0.57 grams, the apothecaries system also reckoned the obol or obolus as 1⁄48 ounce or 1⁄2 scruple. The obolus, along with the mirror, was a symbol of new schismatic heretics in the short story The Theologians by Argentine author Jorge Luis Borges. The currency of the United States of the Ionian Islands was called the Obol The British halfpenny, also known as the obol Obelisks. I of the Loeb Classical Library edition,1914 Plutarch, Lycurgus,9 A History of Measures The Use of Obeliskoi How we came to know about the iron obols, the antecedents of the drachma

2.
Typography
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Typography is the art and technique of arranging type to make written language legible, readable, and appealing when displayed. The arrangement of type involves selecting typefaces, point sizes, line lengths, line-spacing, and letter-spacing, the term typography is also applied to the style, arrangement, and appearance of the letters, numbers, and symbols created by the process. Type design is a closely related craft, sometimes considered part of typography, most typographers do not design typefaces, Typography also may be used as a decorative device, unrelated to communication of information. Until the Digital Age, typography was a specialized occupation, as the capability to create typography has become ubiquitous, the application of principles and best practices developed over generations of skilled workers and professionals has diminished. Babylonian cylinder seals were used to create an impression on a surface by rolling the seal on wet clay, Typography also was implemented in the Phaistos Disc, an enigmatic Minoan printed item from Crete, which dates to between 1850 and 1600 B. C. It has been proposed that Roman lead pipe inscriptions were created with movable type printing, the essential criterion of type identity was met by medieval print artifacts such as the Latin Pruefening Abbey inscription of 1119 that was created by the same technique as the Phaistos Disc. The silver altarpiece of patriarch Pellegrinus II in the cathedral of Cividale was printed with individual letter punches, apparently, the same printing technique may be found in tenth to twelfth century Byzantine reliquaries. Other early examples include individual letter tiles where the words are formed by assembling single letter tiles in the desired order, Typography with movable type was invented during the eleventh-century Song dynasty in China by Bi Sheng. His movable type system was manufactured from ceramic materials, and clay type printing continued to be practiced in China until the Qing Dynasty, wang Zhen was one of the pioneers of wooden movable type. Although the wooden type was more durable under the mechanical rigors of handling, repeated printing wore the character faces down, metal movable type was first invented in Korea during the Goryeo Dynasty, approximately 1230. Hua Sui introduced bronze type printing to China in 1490 AD, the diffusion of both movable-type systems was limited and the technology did not spread beyond East and Central Asia, however. Modern lead-based movable type, along with the printing press, is most often attributed to the goldsmith Johannes Gutenberg in 1439. His type pieces, made from an alloy, suited printing purposes so well that the alloy is still used today. Gutenberg developed specialized techniques for casting and combining cheap copies of letter punches in the vast quantities required to print multiple copies of texts and this technical breakthrough was instrumental in starting the Printing Revolution and the first book printed with lead-based movable type was the Gutenberg Bible. Rapidly advancing technology revolutionized typography in the twentieth century. During the 1960s some camera-ready typesetting could be produced in any office or workshop with stand-alone machines such as introduced by IBM. During the mid-1980s personal computers such as the Macintosh allowed type designers to create typefaces digitally using commercial graphic design software, Digital technology also enabled designers to create more experimental typefaces as well as the practical typefaces of traditional typography. Designs for typefaces could be created faster with the new technology, the cost for developing typefaces was drastically lowered, becoming widely available to the masses

3.
Ampersand
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The ampersand is the logogram &, representing the conjunction word and. It originated as a ligature of the et, Latin for. The word ampersand is a corruption of the phrase and per se &, meaning and intrinsically the word, traditionally, when reciting the alphabet in English-speaking schools, any letter that could also be used as a word in itself was repeated with the Latin expression per se. This habit was useful in spelling where a word or syllable was repeated after spelling, e. g. d, o, g—dog would be clear but simply saying a—a would be confusing without the clarifying per se added. It was also common practice to add the & sign at the end of the alphabet as if it were the 27th letter, pronounced as the Latin et or later in English as and. As a result, the recitation of the alphabet would end in X, Y, Z and this last phrase was routinely slurred to ampersand and the term had entered common English usage by 1837. Through popular etymology, it has been claimed that André-Marie Ampère used the symbol in his widely read publications. The ampersand can be traced back to the 1st century A. D. during the following development of the Latin script that led up to the Carolingian minuscule the use of ligatures in general diminished. The et-ligature, however, continued to be used and gradually became more stylized, the modern italic type ampersand is a kind of et ligature that goes back to the cursive scripts developed during the Renaissance. After the advent of printing in Europe in 1455, printers made extensive use of both the italic and Roman ampersands, since the ampersands roots go back to Roman times, many languages that use a variation of the Latin alphabet make use of it. The ampersand often appeared as a letter at the end of the Latin alphabet, similarly, & was regarded as the 27th letter of the English alphabet, as used by children. An example may be seen in M. B, moores 1863 book The Dixie Primer, for the Little Folks. The popular Apple Pie ABC finishes with the lines X, Y, Z, the ampersand should not be confused with the Tironian et, which is a symbol similar to the numeral 7. Both symbols have their roots in the antiquity, and both signs were used up through the Middle Ages as a representation for the Latin word et. However, while the ampersand was in origin a common ligature in the everyday script, the Tironian et is found in old Irish language script, a Latin-based script generally only used for decorative purposes today, where it signifies agus in Irish. This symbol may have entered the language by way of monastic influence in the time of the early Christian church in Ireland. In everyday handwriting, the ampersand is sometimes simplified in design as a large lowercase epsilon or a backwards numeral 3 superimposed by a vertical line. The ampersand is also shown as a backwards 3 with a vertical line above and below it or a dot above

4.
Asterisk
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An asterisk is a typographical symbol or glyph. It is so called because it resembles a conventional image of a star, computer scientists and mathematicians often vocalize it as star. In English, an asterisk is usually five-pointed in sans-serif typefaces, six-pointed in serif typefaces and it can be used as censorship. It is also used on the Internet to correct ones spelling, the asterisk is derived from the need of the printers of family trees in feudal times for a symbol to indicate date of birth. The original shape was seven-armed, each arm like a shooting from the center. In computer science, the asterisk is used as a wildcard character, or to denote pointers, repetition. Origin Adamantius is known to have used the asteriskos to mark missing Hebrew lines from his Hexapla. The asterisk evolved in shape over time, but its meaning as a used to correct defects remained. In the Middle Ages, the asterisk was used to emphasize a part of text. However, an asterisk was not always used, one hypothesis to the origin of the asterisk is that it stems from the five thousand year old Sumerian character dingir,

5.
At sign
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The at sign, @, normally read aloud as at, also commonly called the at symbol or commercial at, was originally an accounting and commercial invoice abbreviation meaning at a rate of. In contemporary use, the at sign is most commonly used in email addresses and it is now universally included on computer keyboards. The mark is encoded as U+0040 @ Commercial AT, the earliest yet discovered reference to the @ symbol is a religious one, it features in a Bulgarian translation of a Greek chronicle written by Constantinos Manasses in 1345. Held today in the Vatican Apostolic Library, it features the @ symbol in place of the letter alpha A in the word Amen. Why it was used in context is still a mystery. In terms of the character of the at sign, there are several theories pending verification. One theory is that the developed as a mercantile shorthand symbol of each at. For example, the cost of 12 apples @ $1 would be $12, whereas the cost of 12 apples at $1 would be $1, another theory is that medieval monks abbreviated the Latin word ad next to a numeral. One reason for the abbreviation saving space and ink, a theory concerning this graphic puts forward the idea that the form derives from the Latin word ad, using the older form of lower case d, ∂, which persists as the partial derivative symbol. It has been theorized that it was originally an abbreviation of the Greek preposition ανά, meaning at the rate of or per. It is also used like this in Modern French, Swedish or Czech, in view, the at-symbol is a stylised form of à. The compromise between @ and à in French handwriting is found in street market signs, an Italian academic claims to have traced the @ symbol to the 16th century, in a mercantile document sent by Florentine Francesco Lapi from Seville to Rome on May 4,1536. The document is about commerce with Pizarro, in particular the price of an @ of wine in Peru, in Italian, the symbol was interpreted to mean amphora. Currently, the word means both the at-symbol and a unit of weight. Until now the first historical document containing a symbol resembling a @ as a one is the Spanish Taula de Ariza. Even though the oldest fully developed modern @ sign is the one found on the above-mentioned Florentine letter, in contemporary English usage, @ is a commercial symbol, called at site or at rate meaning at and at the rate of. It has rarely used in financial documents or grocers price tags. Since 23 October 2012, the At-sign is registered as a mark by the German Patent

6.
Intellectual property
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Intellectual property refers to creations of the intellect for which a monopoly is assigned to designated owners by law. Intellectual property rights are the protections granted to the creators of IP, and include trademarks, copyright, patents, industrial design rights, and in some jurisdictions trade secrets. Artistic works including music and literature, as well as discoveries, inventions, words, phrases, symbols, the Statute of Monopolies and the British Statute of Anne are seen as the origins of patent law and copyright respectively, firmly establishing the concept of intellectual property. The first known use of the intellectual property dates to 1769. The first clear example of modern usage goes back as early as 1808, the German equivalent was used with the founding of the North German Confederation whose constitution granted legislative power over the protection of intellectual property to the confederation. According to Lemley, it was only at point that the term really began to be used in the United States. The history of patents does not begin with inventions, but rather with royal grants by Queen Elizabeth I for monopoly privileges, the evolution of patents from royal prerogative to common-law doctrine. The term can be used in an October 1845 Massachusetts Circuit Court ruling in the patent case Davoll et al. v. Brown. The statement that discoveries are. property goes back earlier, in Europe, French author A. Nion mentioned propriété intellectuelle in his Droits civils des auteurs, artistes et inventeurs, published in 1846. Until recently, the purpose of property law was to give as little protection as possible in order to encourage innovation. Historically, therefore, they were granted only when they were necessary to encourage invention, limited in time, the concepts origins can potentially be traced back further. In 500 BCE, the government of the Greek state of Sybaris offered one years patent to all who should discover any new refinement in luxury. Intellectual property rights include patents, copyright, industrial design rights, trademarks, plant variety rights, trade dress, geographical indications, a copyright gives the creator of an original work exclusive rights to it, usually for a limited time. Copyright may apply to a range of creative, intellectual, or artistic forms. Copyright does not cover ideas and information themselves, only the form or manner in which they are expressed, an industrial design right protects the visual design of objects that are not purely utilitarian. An industrial design consists of the creation of a shape, configuration or composition of pattern or color, or combination of pattern, an industrial design can be a two- or three-dimensional pattern used to produce a product, industrial commodity or handicraft. Plant breeders rights or plant variety rights are the rights to use a new variety of a plant. The variety must amongst others be novel and distinct and for registration the evaluation of propagating material of the variety is examined, a trademark is a recognizable sign, design or expression which distinguishes products or services of a particular trader from the similar products or services of other traders

7.
Afghan afghani
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The afghani is the currency of Afghanistan. It is nominally subdivided into 100 pul, although there are no pul coins currently in circulation, the first afghani was introduced in 1925. In addition to being subdivided into 100 pul,20 afghani were equal to one amani, the rate of conversion from the rupee is sometimes quoted as 1 afghani =1 rupee 6 paisa, based on the silver contents of the last rupee coins and the first Afghani coins. The Afghani initially contained 9 grams of silver, except during World War I Afghanistans foreign exchange rate has been freely determined by market forces. Bank-e Milli agreed to exchange afghanis at 4 Afs against 1 Indian rupee in 1935, after the establishment of Da Afghanistan Bank as the Central Bank of Afghanistan, such a preferential official fixed exchange rate continued to be practiced. Since 2002, Da Afghanistan Bank has adopted a floating exchange rate regime and has let the exchange rate to be determined freely by market forces, ehsan accused the firm of sending new shipments of Afghani notes to ousted president Burhanuddin Rabbani in northern Takhar province. In April,2000, the afghani traded at 6400 AFA per USD, by 2002, the afghani was valued at 43,000 AFA per USD. In 1930, bronze and brass 1 and 25 pul were added, along with bronze 3 pul, in 1952, aluminium 25 pul and nickel-clad steel 50 pul were introduced, followed by aluminium 2 and 5 afghani in 1958. In 1961 nickel-clad steel 1,2 and 5 afghani were minted, the 1 and 2 afghani coins show years of SH1340, in 1973, the Republic of Afghanistan issued brass-clad-steel 25 pul, copper-clad steel 50 pul and cupro-nickel-clad steel 5 afghani coins. These were followed, between 1978 and 1980, by issues of the Democratic Republic of Afghanistan consisting of aluminium-bronze 25 and 50 pul, a number of commemorative coins were also issued by the Islamic State of Afghanistan between 1995 and 2001. Between 1925 and 1928, Treasury notes were introduced in denominations of 5,10 and 50 afghanis, in 1936,2,20 and 100 afghani notes were added. The Bank of Afghanistan took over paper money production in 1939, the 2 and 5 afghani notes were replaced by coins in 1958. In 1993,5000 and 10,000 afghani notes were introduced. A pothole cave or mouth of a shaft is said to be visible on the 10,000 afghanis banknote as a dark area in the hillside above the ancient pol or gateway at the ruins near Lashkar Gah. This is possibly the entrance to one of the man-made undergrounds at Qala-i-Bost, between October 7,2002, and January 2,2003, a new afghani was introduced with the ISO4217 code AFN. It replaced the previous afghani at two distinct rates. S. dollar, prior to the reissue, there were more than 15 trillion afghani in circulation after unrestrained printing under Taliban rule and during wars and occupation. This was in preparation for October 8 when all prices in the Afghan marketplace were to be specified in afghani. After depreciating during the last quarter of 2003/04, the afghani has been appreciating steadily and this appreciation, at a time of increasing inflation, appears to reflect a greater willingness by the population to use the afghani as a medium of exchange and as a store of value

8.
Argentine austral
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The austral was the currency of Argentina between June 15,1985 and December 31,1991. It was subdivided into 100 centavos, the symbol was an uppercase A with an extra horizontal line, codepoint U+20B3 Austral sign ₳. This symbol appeared on all issued in this currency, to distinguish them from earlier currencies. The ISO4217 code is ARA, finance Minister Juan Vital Sourrouille devised the Austral plan. The austral replaced the peso argentino at a rate of 1 austral =1000 pesos argentinos and it was itself replaced by the peso at a rate of 1 peso =10,000 australes. In 1985, coins were introduced for ½,1,5,10 and 50 centavos. The ½ centavo was only issued in 1985, whilst production of the 1 centavo ceased in 1987,5 centavo ceased in 1988, and that of the other centavo coins ended in 1989. In 1989,1,5 and 10 austral coins were issued, followed in 1990 and 1991 by 100,500 and 1,000 austral denominations. In 1985, provisional issues were made consisting of 1000,5000 and 10,000 peso argentino notes over stamped with the values 1,5 and 10 australes. Between 1985 and 1991, the notes were issued by the Banco Central, All banknotes except the provisional types show on the back an image of Liberty with a torch. The provisional banknotes were produced from modified peso ley plates, on the obverses, the word PESOS were erased, whilst the reverse designs substituted the picture with the denomination written in words without spaces in several rows. The denomination was shown on both faces in the form A10 MIL, A50 MIL and A500 MIL, official website of the Banco Central de la República Argentina Argentine Notes

9.
Ghanaian cedi
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The Ghanaian cedi is the unit of currency of Ghana. It is the fourth and only legal tender in the Republic of Ghana, one Ghana cedi is divided into one hundred pesewas. After it gained independence Ghana ALISSA separated itself from the British West African pound, the new republics first independent currency was the Ghanaian pound. In 1965, Ghana decided to leave the British colonial monetary system, the African name Cedi was introduced in place of the old British pound system. Ghanas first President Kwame Nkrumah introduced Cedi notes and Pesewa coins in July 1965 to replace the Ghanaian pounds, shillings, the cedi was equivalent to eight shillings and four pence and bore the portrait of the President. After the February 14,1966 military coup, the new leaders wanted to remove the face of Nkrumah from the banknotes, the new cedi was worth 1.2 cedi which made it equal to half of a pound sterling at its introduction. After decades of inflation had devalued the new cedi, it was gradually phased out in 2007 in favor of the Ghana cedi at an exchange rate of 1,10,000. In 2007 the largest of the new banknotes, the 20,000 note, had a value of about US$2. By removing four digits the Ghana cedi became the currency unit issued in Africa. It has since lost about 75% of its value, the word cedi is the Akan word for cowry shell which were formerly used as currency in what is now Ghana. The Monetaria moneta or money cowry is not native to West African waters but is a species in the Indian Ocean. The porcelain-like shells came to West Africa, beginning in the 14th century, the shells became an important currency in the slave trade. The first modern coins exclusively used at the Gold Coast was produced in 1796 but cowries was used alongside coins, the first cedi was introduced in 1965, replacing the pound at a rate of 2.4 cedi =1 pound, or 1 pesewa =1 penny. The first cedi was pegged to the British pound at a rate of 2.4 cedis =1 pound, the first cedi was replaced in 1967 by a new cedi which was worth 1.2 first cedis. This allowed a decimal conversion with the pound, namely 2 second cedis =1 pound, the change also provided an opportunity to remove Kwame Nkrumahs image from coins and notes. The second cedi was pegged to the British pound at a rate of 2 cedi =1 pound. However, within months, the cedi was devalued to a rate of 2.45 second cedi =1 pound. This rate was equivalent to 1 cedi =0.98 U. S. dollars, further pegs were set of $0.55 in 1971, $0.78 in 1972, and $0.8696 in 1973 before the currency was floated in 1978

10.
Bitcoin
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Bitcoin is both a cryptocurrency and an electronic payment system,3 invented by an unidentified programmer, or group of programmers, under the name of Satoshi Nakamoto. Bitcoin was introduced on 31 October 2008 to a mailing list. The identity of Nakamoto remains unknown, though many have claimed to know it, the system is peer-to-peer, and transactions take place between users directly, without an intermediary. These transactions are verified by network nodes and recorded in a public distributed ledger called the blockchain, since the system works without a central repository or single administrator, the U. S. Treasury categorizes bitcoin as a decentralized virtual currency. Bitcoin is often called the first cryptocurrency, although prior systems existed, Bitcoin is the largest of its kind in terms of total market value. Bitcoins are created as a reward in a competition in which users offer their computing power to verify and this activity is referred to as mining and successful miners are rewarded with transaction fees and newly created bitcoins. Besides being obtained by mining, bitcoins can be exchanged for other currencies, products, when sending bitcoins, users can pay an optional transaction fee to the miners. This may expedite the transaction being confirmed, as of February 2015, over 100,000 merchants and vendors accept bitcoin as payment. Instead of a 2–3% fee typically imposed by credit card processors, despite the fourfold increase in the number of merchants accepting bitcoin in 2014, the cryptocurrency did not have much momentum in retail transactions. The European Banking Authority and other sources have warned that bitcoin users are not protected by refund rights or chargebacks, the use of bitcoin by criminals has attracted the attention of financial regulators, legislative bodies, law enforcement, and media. Criminal activities are focused on darknet markets and theft, though officials in countries such as the United States also recognize that bitcoin can provide legitimate financial services. The word bitcoin occurred in the paper that defined bitcoin published in 2008. It is a compound of the bit and coin. The white paper uses the shorter coin. There is no convention for bitcoin capitalization. Some sources use Bitcoin, capitalized, to refer to the technology and network and bitcoin, lowercase, the Wall Street Journal, The Chronicle of Higher Education, and the Oxford English Dictionary advocate use of lowercase bitcoin in all cases, which this article follows. The blockchain is a ledger that records bitcoin transactions. A novel solution accomplishes this without any trusted central authority, maintenance of the blockchain is performed by a network of communicating nodes running bitcoin software, transactions of the form payer X sends Y bitcoins to payee Z are broadcast to this network using readily available software applications

11.
Exclamation mark
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The exclamation mark or exclamation point is a punctuation mark usually used after an interjection or exclamation to indicate strong feelings or high volume, and often marks the end of a sentence. Similarly, an exclamation mark is often used in warning signs. Other uses include, In mathematics it denotes the factorial operation, at the beginning of an expression to denote logical negation, e. g. A means the logical negation of A, also called not A. Graphically the exclamation mark is represented as a stop point with a vertical line above. One theory of its origin is that it is derived from a Latin exclamation of joy, the modern graphical representation is believed to have been born in the Middle Ages. Medieval copyists wrote the Latin word io at the end of a sentence to indicate joy, over time, the i moved above the o, and the o became smaller, becoming a point. The exclamation mark did not have its own dedicated key on standard manual typewriters before the 1970s, instead, one typed a period, backspaced, and typed an apostrophe. In the 1950s, secretarial dictation and typesetting manuals in America referred to the mark as bang, appeared in dialogue balloons to represent a gun being fired, although the nickname probably emerged from letterpress printing. This bang usage is behind the names of the interrobang, an unconventional character, and a shebang line. In the printing world, the mark can be called a screamer, a gasper. In hacker culture, the mark is called bang, shriek, or, in the British slang known as Commonwealth Hackish. For example, the password communicated in the spoken phrase Your password is em-nought-pee-aitch-pling-en-three is m0ph. n3, the exclamation mark is common to languages using the Latin alphabet, although usage varies slightly between languages. The exclamation mark was adopted in languages written in other scripts, such as Greek, Russian, Arabic, Hebrew, Chinese, Korean, Japanese and Devanagari. A sentence ending in an exclamation mark may be an exclamation, or an imperative, or may indicate astonishment or surprise, They were the footprints of a gigantic hound. Exclamation marks are occasionally placed mid-sentence with a similar to a comma, for dramatic effect, although this usage is obsolescent, On the walk. Informally, exclamation marks may be repeated for emphasis. The exclamation mark is used in conjunction with the question mark. This can be in protest or astonishment, a few writers replace this with a single, nonstandard punctuation mark, the interrobang, which is the combination of a question mark and an exclamation mark

12.
Ditto mark
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The ditto mark is a typographic symbol indicating that the word or figure above it are to be repeated. For example, The word ditto comes from the Tuscan language, the first recorded use of ditto with this meaning in English occurs in 1625. The graphical shape of the mark may vary according to different language uses. It is generally represented by a quotation mark pointing to the right, therefore, it would be ” in English, » in French, „ in German, and so on. The abbreviation do. is also used, iteration mark Dittography The dictionary definition of 〃 at Wiktionary